100 Mm) Photon-Counting UV Detectors”

This year’s cover celebrates the Hubble Space Telescope, showing its 25th-anniversary deep-sky image reflected in a conceptual large-aperture segmented telescope primary mirror. Nine Cosmic Origins Strategic Astrophysics Technology (SAT) project images are set on the faces of three cubes, symbolizing how technological developments serve as building blocks for future missions that will continue to expand our understanding of how the universe came to be. Cosmic Origins Program Annual Technology Report Table of Contents Executive Summary . 4 1 . Science Overview . 6 2 . Strategic Technology Development Process and Portfolio . 9 3 . Technology Gaps . 14 4 . Technology Priorities and Recommendations . 41 5 . Benefits and Successes Enabled by the COR SAT Program . 44 6 . Closing Remarks . 48 References . 49 Appendix A – Technology Development Quad Charts. 50 Appendix B – Technology Development Status . 59 Appendix C – Training the Future Astrophysics Workforce . 140 Appendix D – Acronyms . 146 http://cor.gsfc.nasa.gov 3 Cosmic Origins Program Annual Technology Report COR 2015 PATR Executive Summary What is the Cosmic Origins (COR) Program? From ancient times, humans have looked up at the night sky and wondered: Are we alone? How did the universe come to be? How does the universe work? COR focuses on the second question . Scientists investigating this broad theme seek to understand the origin and evolution of the universe from the Big Bang to the present day, determining how the expanding universe grew into a grand cosmic web of dark matter enmeshed with galaxies and pristine gas, forming, merging, and evolving over time . COR also seeks to understand how stars and planets form from clouds in these galaxies to create the heavy elements that are essential to life – starting with the first generation of stars to seed the universe, and continuing through the birth and eventual death of all subsequent generations of stars . The COR Program’s purview includes the majority of the field known as astronomy, from antiquity to the present . One surprising recent discovery is that the universe is expanding at an ever-accelerating rate, the first hint of what we now call dark energy, estimated to account for 75% of mass-energy in the universe . Dark matter, so called because we only observe its effects on regular matter, accounts for another 20%, leaving only 5% for regular matter and energy . Scientists now also search for special polarization in the cosmic microwave background to support the notion that in the split-second after the Big Bang, the universe inflated faster than the speed of light! Since this would have been an expansion of space itself, and not energy or matter moving faster than light, the Theory of Relativity would remain intact . The most exciting aspect of this grand enterprise today is that we can finally develop the tools needed for such discoveries . Why is COR Technology Development Critical? A 2008 Space Review paper noted that robust technology development and maturation is crucial to reducing flight project schedule and cost over-runs: “…in the mid-1980s, NASA’s budget office found that during the first 30 years of the civil space program, no project enjoyed less than a 40% cost overrun unless it was preceded by an investment in studies and technology of at least 5 to 10% of the actual project budget that eventually occurred” [1] . Such technology maturation program is most efficiently addressed through focused R&D projects, rather than in flight projects, where “marching armies” make the cost of delays unacceptably high . The 2010 Decadal Survey, New Worlds, New Horizons in Astronomy and Astrophysics (NWNH) stressed that “Technology development is the engine powering advances in astronomy and astrophysics... Failure to develop adequately mature technology prior to a program start also leads to cost and schedule overruns” [2] . NASA requires flight projects to demonstrate technology readiness level (TRL) 6* by Preliminary Design Review (PDR) for all technologies they need . However, this can only succeed with a process in place to correctly identify and adequately fund development of relevant “blue sky” technologies to TRL 3†, and then mature them to TRL 5‡ or 6, across the so-called “mid-TRL gap ”. This enables robust mission concepts, letting the community focus its strategic planning on proposed missions’ scientific relevance . What’s in this Report? What’s New? This fifth Program Annual Technology Report (PATR) summarizes the Program’s technology development activities for fiscal year (FY) 2015 . It lists technology gaps identified by the astrophysics community (p . 16), with their priority ranking assigned by the COR Technology Management Board (TMB) (p . 43) . Following this year’s prioritization, the Program Office recommends NASA HQ first solicit and fund the following technologies: * TRL 6: “System/sub-system model or prototype demonstration in a relevant environment.” NPR 7123 .1B, Appendix E . † TRL 3: “Analytical and experimental critical function and/or characteristic proof-of-concept.” NPR 7123 .1B, Appendix E . ‡ TRL 5: “Component and/or breadboard validation in relevant environment.” NPR 7123 .1B, Appendix E . 4 Cosmic Origins Program Annual Technology Report • Large-Format, Low-Noise and Ultralow-Noise Far-IR Direct Detectors; • Band-Shaping and Dichroic Filters for UV/Vis; • Heterodyne Far-IR Detector Arrays and Related Technologies; • High-QE, Rad-Hard, Large-Format, Non-Photon-Counting UVOIR Detectors; • Photon-Counting Large-Format UV Detectors; • High-Efficiency UV Multi-Object Spectrometers; and • High-Reflectivity Mirror Coatings for UV/Vis/Near-IR . These recommendations take into account a set of large mission concepts identified by the Astrophysics Division Director as candidates to be studied to inform the 2020 Decadal Survey . These include three of five “Surveyor” concepts described in the 2013 Astrophysics Roadmap, “Enduring Quests, Daring Visions,” as well as the NWNH-recommended Habitable Exoplanet Imaging Mission . The COR Program Analysis Group (COPAG) and the Program Analysis Groups (PAGs) for the Physics of the Cosmos (PCOS) program, PhysPAG, and Exoplanet Exploration Program (ExEP), ExoPAG, later concurred with this list . The COR Program Office and TMB are ready to respond to technology gaps identified by these studies . Meanwhile, the Program is pleased to announce four newly awarded COR Strategic Astrophysics Technology (SAT) projects for FY 2016 start (alphabetically, by Principal Investigator, PI): • “Raising the TRL of 4 .7-THz Local Oscillators,” Qing Hu, MIT; • “Advanced FUV/UV/Visible Photon-Counting Ultralow-Noise Detectors,” Shouleh Nikzad, JPL; • “Building a Better ALD – Use of Plasma-Enhanced ALD to Construct Efficient Interference Filters for the FUV,” Paul Scowen, Arizona State University (ASU); and • “Development of Large-Area Photon-Counting UV Detectors,” John Vallerga, UC Berkeley . Including these, the Astrophysics Division has awarded 15 COR SAT projects to date, funded by COR Supporting Research and Technology (SR&T), and intended to develop telescopes, optics, coatings, and detectors from the Far-IR to the far-ultraviolet (Far-UV), applicable to future strategic COR missions . Eight projects continued from previous years, each reporting significant progress, with several prepared for TRL advancement review . One of these, developing advanced UV-reflective coatings, has now been completed . This PATR reports on the progress, current status, and activities planned for the coming year for the eight projects funded in FY 2015 . We thank the PIs of our ongoing projects for their informative progress reports (Appendix A – quad charts, p . 50; Appendix B – development status, p . 59), and welcome our new awardees, two of whom are returning PIs (abstracts at the end of Appendix B) . The following are some examples where Program-funded technologies were infused, or are planned to be infused, into projects and missions, or were deployed at existing facilities: • Successful on-sky demonstration of kinetic inductance detector (KID) array system at Caltech Submillimeter Observatory (CSO) (2013); • TES bolometer detector was selected to support the Stratospheric Observatory for Infrared Astronomy (SOFIA) High-resolution Airborne Wide-bandwidth Camera (HAWC) instrument (2015 deployment); • High-efficiency Solid-state Photon-counting Ultraviolet Detector (SPUD) will be flight-tested on the Faint Intergalactic medium Redshifted Emission Balloon (FIREBall) experiment (2016 launch); • High-reflectivity UV coatings were used to coat optics for Ionospheric Connection (ICON) and Global-scale Observations of the Limb and Disk (GOLD) Explorers (2017 launches); and • The Wide-Field Infrared Survey Telescope/Astrophysics Focused Telescope Assets (WFIRST/AFTA) study has adopted the H4RG Near-IR detector to address some of the most enduring questions in astrophysics (mid-2020s launch) . Finally, this PATR introduces a new feature titled “Developing the Future Astrophysics Workforce,” (Appendix C, p . 140) . This feature introduces the students and post-doctoral fellows who have worked on and contributed to our SAT projects, gaining the knowledge and experience that will enable them to push the field of astrophysics forward in the coming decades . 5 Cosmic Origins Program Annual Technology Report 1. Science Overview The goal of the COR Program is to understand the origin and evolution of the universe from the Big Bang to the present day . On the largest scale, COR’s broad-reaching

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